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Optimal Audio

Optimal Audio Cuboid 15 15" Passive Speaker

Optimal Audio Cuboid 15 15" Passive Speaker

In stock

Regular price $917.00 USD
Regular price Sale price $917.00 USD
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Prices VAT inclusive. UK delivery free.

Cuboid 15 is a full range, two-way, passive, 15” loudspeaker designed to perform. For any applications requiring big output, it effortlessly delivers rich and detailed sound with extra punch and precision.

With its steel grille and optional mounting hardware the professionally presented Cuboid 15 can be fixed in either portrait or landscape mode for a flexible, simple installation.

Cuboid 15 features a 15” (380mm) low frequency (LF) driver for extra bass and midband with a 1″ (25mm) exit high frequency (HF) compression driver for clarity of vocal and high frequency projection. The HF section delivers consistent coverage in either plane from a user-rotatable horn.

When coupled with the Zone series, a ZonePad and the WebApp makes setting up a system and end user control simple and intuitive.

Main Features

  • Portrait or landscape mounting options
  • Rotatable high-frequency horn
  • 58Hz – 18kHz frequency response ±3dB
  • Maximum SPL 126dB (continuous), 132dB (peak)
  • 80° horizontal x 50°  vertical coverage
  • Finish: Black


  • TYPE:  Two-way, full range, passive loudspeaker
  • FREQUENCY RESPONSE (with preset):  
    • 58Hz – 18kHz ± 3dB
    • -10dB @ 40Hz
  • DRIVERS:  
    • LF: 15” (380mm), ferrite motor system
    • HF: 1” (25mm) exit/1.75” (44mm) voice coil, polymide dome compression driver
  • RATED POWER:  500W (AES) 2000W (Peak)
  • SENSITIVITY (1W/1m):  99dB
  • MAXIMUM SPL:  126dB (cont), 132dB (peak)
  • CROSSOVER:  2.3kHz passive
  • DISPERSION (-6dB):  80˚ H x 50˚ V (user-rotatable)
  • ENCLOSURE:  Trapezoid wooden cabinet
  • FINISH:  Black textured paint
  • PROTECTIVE GRILLE:  Black perforated steel with scrim cloth backing
  • CONNECTORS:  2x NL4 type
  • FITTINGS:  19 x M8, inset bolts
    • (W) 426.5mm x (H) 691.5mm x (D) 416mm
    • (W) 16.79” x (H) 27.22” x (D) 16.38”
  • WEIGHT:  28kg (61.73lbs)

Manufacturer: Optimal Audio

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